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/*
* Copyright (C) 2025 Igalia, S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#pragma once
#if ENABLE(WEBXR) && USE(OPENXR)
#include "OpenXRSwapchain.h"
#include "OpenXRUtils.h"
#include <WebCore/PlatformXR.h>
#include <wtf/Noncopyable.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/UniqueRef.h>
#include <wtf/Vector.h>
namespace WebCore {
class GBMDevice;
class GLContext;
class GLDisplay;
}
namespace WebKit {
struct XRDeviceLayer;
class OpenXRLayer {
WTF_MAKE_TZONE_ALLOCATED(OpenXRLayer);
WTF_MAKE_NONCOPYABLE(OpenXRLayer);
public:
virtual ~OpenXRLayer();
virtual std::optional<PlatformXR::FrameData::LayerData> startFrame() = 0;
virtual XrCompositionLayerBaseHeader* endFrame(const XRDeviceLayer&, XrSpace, const Vector<XrView>&) = 0;
#if USE(GBM)
void setGBMDevice(RefPtr<WebCore::GBMDevice>);
#endif
protected:
OpenXRLayer(UniqueRef<OpenXRSwapchain>&&);
std::optional<PlatformXR::FrameData::ExternalTexture> exportOpenXRTextureDMABuf(WebCore::GLDisplay&, WebCore::GLContext&, PlatformGLObject);
#if USE(GBM)
std::optional<PlatformXR::FrameData::ExternalTexture> exportOpenXRTextureGBM(WebCore::GLDisplay&, PlatformGLObject);
void blitTexture() const;
#endif
std::optional<PlatformXR::FrameData::ExternalTexture> exportOpenXRTexture(PlatformGLObject);
UniqueRef<OpenXRSwapchain> m_swapchain;
uint64_t m_renderingFrameIndex { 0 };
using ReusableTextureIndex = uint64_t;
HashMap<PlatformGLObject, ReusableTextureIndex> m_exportedTextures;
ReusableTextureIndex m_nextReusableTextureIndex { 0 };
#if USE(GBM)
RefPtr<WebCore::GBMDevice> m_gbmDevice;
HashMap<PlatformGLObject, PlatformGLObject> m_exportedTexturesMap;
PlatformGLObject m_fbosForBlitting[2] { 0, 0 };
#endif
};
class OpenXRLayerProjection final: public OpenXRLayer {
WTF_MAKE_TZONE_ALLOCATED(OpenXRLayerProjection);
WTF_MAKE_NONCOPYABLE(OpenXRLayerProjection);
public:
static std::unique_ptr<OpenXRLayerProjection> create(std::unique_ptr<OpenXRSwapchain>&&);
private:
explicit OpenXRLayerProjection(UniqueRef<OpenXRSwapchain>&&);
std::optional<PlatformXR::FrameData::LayerData> startFrame() final;
XrCompositionLayerBaseHeader* endFrame(const XRDeviceLayer&, XrSpace, const Vector<XrView>&) final;
XrCompositionLayerProjection m_layerProjection;
Vector<XrCompositionLayerProjectionView> m_projectionViews;
};
} // namespace WebKit
#endif // ENABLE(WEBXR) && USE(OPENXR)
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